Round here (Brum) the roads look like the place has seen a return visit from the Luftwaffe. We are talking 50/60 potholes per mile.
Since relaying roads was outlawed a few years back, I guess this means we;ll just get a shovelful of tarmac "patch" which will disappear before next months council tax bill.
What is it in snow/cold weather that causes such damage ? Is it ice expansion into voids breaking up the surface, or some action of grit plus wheels ?
Even more OT ... is there a required standard of road in terms of surface variation ? Maybe tucked away in a DoT/HA book somewhere ?